Diisopropylethylamine → (S)-3-cyclopentyl-N-[1-(2-methoxy-2-methyl-propyl)-1H-pyrazol-3-yl]-2-(1-oxo-1,3-dihydro-isoindol-2-yl)-propionamide

Participants

Reaction Steps

To a solution of (S)-3-cyclopentyl-2-(1-oxo-1,3-dihydro-isoindol-2-yl)-propionic acid (prepared as in Example 9, 0.1 g, 0.37 mmol) and 1-(2-methoxy-2-methyl-propyl)-1H-pyrazol-3-ylamine (prepared as in US 20080021032, Example 94, 0.065 g, 0.38 mmol) and benzotriazole-1-yl-oxy-tris-(dimethylamino)-phosphonium hexafluorophosphate (0.19 g, 0.44 mmol) in methylene chloride (10 mL) was added N,N-diisopropylethylamine (0.19 mL, 1.10 mmol) and the resulting solution stirred at room temperature for 19 h. The solution was diluted with methylene chloride, washed with a 1 N hydrochloric acid solution (15 mL), a saturated sodium chloride solution, and dried over magnesium sulfate. The mixture was filtered and evaporated and the resulting material purified via automated flash chromatography (Analogix, SF15-40 g column, 50%-70% ethyl acetate/hexanes) to afford (S)-3-cyclopentyl-N-[1-(2-methoxy-2-methyl-propyl)-1H-pyrazol-3-yl]-2-(1-oxo-1,3-dihydro-isoindol-2-yl)-propionamide (0.063 g, 0.21 mmol, 41%) as an off white solid; [α]29D=−47.5° (c=0.28, chloroform); HR-ES(+) m/e calcd for C24H32N4O3 [M+Na]+ 447.2366, observed 447.2368; 1H NMR (300 MHz, DMSO-d6) δ ppm 10.88 (s, 1H), 7.70 (d, J=7.2 Hz, 1H), 7.62 (m, 2H), 7.48 (d, J=2.3 Hz, 1H), 7.45-7.54 (m, 1H), 6.43 (d, J=2.3 Hz, 1H), 5.05 (dd, J=10.7, 5.0 Hz, 1H), 4.87 (d, J=17.8 Hz, 1H), 4.53 (d, J=17.8 Hz, 1H), 3.99 (s, 2H), 3.15 (s, 3H), 1.07 (s, 3H), 1.06 (s, 3H), 0.98-2.10 (m, 11H).

Provenance & Evidence